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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <BpBinderFuzzFunctions.h>
#include <IBinderFuzzFunctions.h>
#include <commonFuzzHelpers.h>
#include <fuzzer/FuzzedDataProvider.h>
#include <android-base/logging.h>
#include <binder/BpBinder.h>
#include <binder/IServiceManager.h>
#include <binder/RpcServer.h>
#include <binder/RpcSession.h>
#include <signal.h>
#include <sys/prctl.h>
#include <thread>
namespace android {
// Fuzzer entry point.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
FuzzedDataProvider fdp(data, size);
std::string addr = std::string(getenv("TMPDIR") ?: "/tmp") + "/binderRpcBenchmark";
(void)unlink(addr.c_str());
sp<RpcServer> server = RpcServer::make();
// use RPC binder because fuzzer can't get coverage from another process.
auto thread = std::thread([&]() {
prctl(PR_SET_PDEATHSIG, SIGHUP); // racey, okay
server->setRootObject(sp<BBinder>::make());
CHECK_EQ(OK, server->setupUnixDomainServer(addr.c_str()));
server->join();
});
sp<RpcSession> session = RpcSession::make();
session->setMaxIncomingThreads(1);
status_t status;
for (size_t tries = 0; tries < 5; tries++) {
usleep(10000);
status = session->setupUnixDomainClient(addr.c_str());
if (status == OK) break;
}
CHECK_EQ(status, OK) << "Unable to connect";
sp<BpBinder> bpBinder = session->getRootObject()->remoteBinder();
// To prevent memory from running out from calling too many add item operations.
const uint32_t MAX_RUNS = 2048;
uint32_t count = 0;
sp<IBinder::DeathRecipient> s_recipient = new FuzzDeathRecipient();
while (fdp.remaining_bytes() > 0 && count++ < MAX_RUNS) {
if (fdp.ConsumeBool()) {
callArbitraryFunction(&fdp, gBPBinderOperations, bpBinder, s_recipient);
} else {
callArbitraryFunction(&fdp, gIBinderOperations, bpBinder.get());
}
}
CHECK(session->shutdownAndWait(true)) << "couldn't shutdown session";
CHECK(server->shutdown()) << "couldn't shutdown server";
thread.join();
return 0;
}
} // namespace android
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